trunk/src/main/org/apache/tools/ant/types/resources/comparators/Date.java

/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */
package org.apache.tools.ant.types.resources.comparators;

import org.apache.tools.ant.types.Resource;

/**
 * Compares Resources by last modification date.
 * @since Ant 1.7
 */
public class Date extends ResourceComparator {
    /**
     * Compare two Resources.
     * @param foo the first Resource.
     * @param bar the second Resource.
     * @return a negative integer, zero, or a positive integer as the first
     *         argument is less than, equal to, or greater than the second.
     */
    protected int resourceCompare(Resource foo, Resource bar) {
        long diff = foo.getLastModified() - bar.getLastModified();
        if (diff > 0) {
            return +1;
        } else if (diff < 0) {
            return -1;
        } else {
            return 0;
        }
    }

}